| 摘要 |
PROBLEM TO BE SOLVED: To provide a holding force measuring apparatus which can eliminate inconvenience of a conventional holding force measuring apparatus which is on a held side with rigidity of a tool or the like to be held and difference in diameter derived therefrom impairing correct measurement of an actual holding force and a holding force during operation of a chuck device.SOLUTION: A chuck device is used also as a holding force measuring apparatus. To provide the chuck device itself with a holding force measuring function, a plurality of strain gauges are attached to a circumferential part of the chuck device where a reaction force of the holding force is received during holding time, and strain is measured to enable measurement of the actual holding force when holding a tool and also to enable consecutive measurement of the holding force during the operation.SELECTED DRAWING: Figure 3 |
